Proliferating trichilemmal tumor: case report

Abstract

Proliferating trichilemmal tumor is a rare tumor originating in the external root sheath, that is usually found in the scalp of middle-aged or elderly females. Its histologic appearance may not correlate with its clinical behavior. In addition, there are no guidelines available for the treatment of these tumors, making its management a challenge for physicians. We report the case of a 53 year-old woman with a proliferating trichilemmal tumor on her nose, which is a very uncommon location for these lesions. Resumo: Tumor triquilemal proliferante é um tumor raro com origem na baínha radicular externa, que é encontrado geralmente no couro cabeludo de mulheres de meia idade ou idosas. A sua aparência his-tológica pode não se correlacionar com o seu comportamento clínico. Além disso, não há diretrizes dis-poníveis para o tratamento destes tumores, tornando a sua gestão um desafio para os médicos. Relatamos o caso de uma mulher de 53 anos com com um tumor triquilémico proliferante no nariz, que é uma localização muito incomum para essas lesões.

Proliferating trichilemmal tumour of the eyelid in a 7-year-old girl

“…The tumours measured up to 25 cm in maximum dimension with a mean of 3.3 cm in size 10. Previously, the youngest reported age of PTT in the literature was 16 years old 4…”

“…PTT predominantly occurs in women and is found most commonly on the scalp during the fourth to eight decades of life. The youngest reported patient diagnosed with PTT was previously reported as 16 years old 3 4. In this report, we discuss the first case of PTT in a 7-year-old girl and the presentation, diagnosis, treatment and prognosis of this disease.…”

“…The most widespread therapeutic approach in managing PTT is surgical excision with histological margin of 1 cm; however, there are no uniformly recommended margins or depth of incision 4 14. Sau et al report simple excision of PTT is curative, but the tumours have the ability to recur and become malignant if not completely excised 3.…”

A proliferating trichilemmal cyst in the perianal region: A case report

“…PTC, a benign neoplasm arising from the external epithelial sheath of the hair follicle, is histologically characterized by trichilemmal keratinization, which corresponds to the abrupt transition from nucleated epithelial cells to anucleated keratinized cells, without the formation of a granular layer [ 3 , 4 , 11 ].…”

Imaging findings of trichilemmal cyst and proliferating trichilemmal tumour

“…2,6 Many case reports have described the computed tomography (CT) and magnetic resonance imaging (MRI) findings of TCs and PTTs. [7][8][9][10][11][12][13][14][15] Although CT and MRI findings 16 and sonographic features 17 of TCs or PTTs have been reported in a few case series, to the best of our knowledge, no studies have published CT and MRI findings of TCs and PTTs. Thus, this study aimed to describe the CT and MRI findings of TCs and PTTs and assess the differences between the two pathologies.…”